refactor to unify data fetching and define abstract API for re-use

Jellyfin.Plugin.SRFPlay/Services/Interfaces/IContentExpirationService.cs

@@ -0,0 +1,24 @@
+using System.Threading;
+using System.Threading.Tasks;
+
+namespace Jellyfin.Plugin.SRFPlay.Services.Interfaces;
+
+/// <summary>
+/// Interface for managing content expiration.
+/// </summary>
+public interface IContentExpirationService
+{
+    /// <summary>
+    /// Checks for expired content and removes it from the library.
+    /// </summary>
+    /// <param name="cancellationToken">The cancellation token.</param>
+    /// <returns>The number of items removed.</returns>
+    Task<int> CheckAndRemoveExpiredContentAsync(CancellationToken cancellationToken);
+
+    /// <summary>
+    /// Gets statistics about content expiration.
+    /// </summary>
+    /// <param name="cancellationToken">The cancellation token.</param>
+    /// <returns>Tuple with total count, expired count, and items expiring soon.</returns>
+    Task<(int Total, int Expired, int ExpiringSoon)> GetExpirationStatisticsAsync(CancellationToken cancellationToken);
+}